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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.nereids.rules.rewrite;

import org.apache.doris.nereids.rules.Rule;
import org.apache.doris.nereids.rules.RuleType;

import com.google.common.collect.ImmutableList;

import java.util.List;

/**
 * SELECT * FROM lineorder ORDER BY 'f' -> SELECT * FROM lineorder
 */
public class EliminateSortUnderSubqueryOrView implements RewriteRuleFactory {
    @Override
    public List<Rule> buildRules() {
        return ImmutableList.of(
            RuleType.ELIMINATE_ORDER_BY_UNDER_SUBQUERY.build(
                logicalSubQueryAlias(logicalSort())
                        .then(subq -> subq.withChildren(subq.child().child(0)))
            ),
            RuleType.ELIMINATE_ORDER_BY_UNDER_VIEW.build(
                logicalView(logicalSort())
                        .then(view -> view.withChildren(view.child().child(0)))
            )
        );
    }
}
